"He [Dagg] got injured last year and couldn't show that talent but he's had a great off-season and has come back in great form. He's the player we know he can be and, when he's like that, he can be world-class."
Dagg was creative and sound under the high ball; a constant threat to a Welsh team pushed over the limit.
"The pace from their back three caused us some problems," Wales coach Warren Gatland said. "Their counter-attacking was absolutely superb, so that will be a big work-on for us."
Dagg admitted recently he had refound his love of the game, which has played a big part in his form.
"I just really enjoyed it. It's always good playing under the roof with all the opportunities [that provides]."
Asked whether he felt he was reaching the form of his efforts during the 2011 World Cup, Dagg said: "That's a long time ago. I'm just really enjoying my footy and staying calm in my head and doing what's best for my team. If the ball goes into the air, I have to take it; just nailing my role, really.
"Obviously Bender is a great fullback as well. There's a lot of competition in the team but we get on really well and do what's best for the team. We've got Waisake, we've got Bender and Beaudy who goes to fullback ... and scores all the tries.
"Bender is an outstanding athlete. He's extremely gifted, quick, good in the air and he's got great vision."